Window spring



July 17,1923

1,462,235 O.'A. LAWRENCE WINDOW SPRING Original Filed Dec. 2, 1920 lnvim'roe oscma A. LAWRENCE By- ATTORNEy Patented July 17, 1923.

UNITED STATES PATENT OFFICE.

OSCAR A. LAWRENCE, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO URBAN H. ROBERTS, OF SAN FRANCISCO, CALIFORNIA.

WINDOW SPRING.

Application filed December 2, 1920, Serial No. 427,724. Renewed April 18, 1923.

To all whom it'ma'y concern.

Be it known that I, OSCAR A. LAWRENCE,

a citizen of the United States, and a resident of the city and county. of San F ran- 5 cisco, State of California, have made a new and useful invention-to wit, Improvements in Window Springs; and I do hereby declare the following to be a. full, clear, concise, and exact description of the same.

This invention relates particularly to a window spring designed and adapted to pre-"' vent the movement of the window sash laterally in its guide frame with the consequential elimination of noise and rattling 15 but to not ofi'er any impedence to the upward .or downward movement of the window.

A' further object is-to provide a device of this character that is simple in construc- 2 tion, capable of being manufactured cheaply in la-r e quantities'and quickly and easily applied to a window sash structure. Other objects and advantages will appear as this specification progresses.

In this specification and the annexed drawings, the invention is illustrated in the form considered to be the best, but it is to be understood that the invention is not limited to such form, because it may be em- 30 bodied in other forms, and it is also to be understood that in and by the claims fol lowing the description, it is desired to cover the invention in whatsoever form it may be embodied.

In the accompanying one-sheet of drawlugs,

Figure 1 represents a plan section through a window sash casing having my invention applied thereto.

40 Figure 2 represents an enlarged perspective view of a window spring constructed in accordance with my invention.

Figure 3 represents a plan view of the window spring blank.

In detail the structure illustrated in the drawin com rises a strip of material, preferably fight eet metal having a head portion 1 thereon, a depending section 2 and a laterally pro'ec portion 3 formed adjacent the head 1. The. head member 1 is a portioned' from the bod member 2 one crease line 4 the said spending section 2 being bend on an arcuate contour with respect to the plane of said head.

The lateral projection 3 on the head portion 1 is bended at right angles thereto and has the terminus thereof provided with a serrated end as indicated at 5, rebended at right angles-to the last mentioned section so as to lie substantially parallel with the plane of the head portion 1. The pointed ends 5 of the lateral projection 3 are of sufiicient length to be driven into a window casing for positioning the spring thereon but without forming too great a resistance for withdrawal.

Figure 1 illustrates the application of a window spring of the anti-rattling type to the sash casing, the said casing being designated by the numeral 6, the side of the window sash by the numeral 7, the central vertical stop by the numeral 8 and the ide batten by the numeral 9. In the ma ority of windows, space remains between the contacting surfaces of the window sash and casing for the purpose of free vertical movement of the said sash. During windy pe riods, the force thereof strikes the window sash resulting in the lateral and edgewise movement thereof. in its guide frame. Ap-

plicant proposes to do away with-the free movement of the sash by interposing the window spring between the said sash and the casing by inserting the serrated end 5 between the batten 9 and easing 6 and permitting the shoulder portion 3 thereof to lie parallel with the vertical edge of the batten 9, thus placing the bow-shaped or arcuate arm 2 in the space between' sash edge and casing. The depth of the bow is 1 preferably made the e uivalent of the largest space that would or inarily be found between the sash edge and easing so that where this space diminishes, the depth of the how would likewise decrease or assume a more straightened position. The diminishing or increasing of the depth of the bow by the edgewise movement of the sash comprises the cause and effect for either makin or preventing the noise of window ratt ing.

Having thus described this invention,

what I claim and desire to secure by Letters Patent is: p

1. A device such as described comprising a strip of metal with a head portion thereon and an end portion formed in an arcuate contour; said head portion having a lateral projection adjacent the end thereof, bent at right angles thereto and terminating with parallel with that of the head portion, and an end rebended on a plane substantially having the end of said lateral projection parallel with that of the head portion. serrated.

2. A device such as described comprising In testimony whereof, I have hereunto set a strip of metal with a head portion thereon my hand at San Francisco, California, this 15 and an enddplortipn formeill1 in an alrcuatei 26th day of November, 1920. contour; sai ea portion aving a atera projection adjacent the end thereof, bent at OSCAR LAWRENCE right angles thereto and terminating with In presence of- 10 an end rebended on a plane substantially LINCOLN V. JOHNSON. 

